Unknown Shores
are here to flash back Bump in the Night, I chose them because they don't slow you down, but you can replace them with guildgates or something.
Consume Spirit is a finisher, and something to dump those extra Dark Rituals on.
Tyrant's Choice
will always hit for 4 damage, because there's only 2 players.
Soul Reap
Gets sideborded out when you're up against green, I guess
Hideous End
is the best replacement here.
Read the Bones
could be cut, but I tend to need more card advantage mid-game.
Morsel Theft
is awesome, and 60% of your creatures turn on the Prowl cost.
Dark Ritual helps get you a turn one
Soulcage Fiend
or
Choking Sands
. It also helps turn on
Soul Reap
's life-loss ability.
Dash Hopes is controversial. It usually turns out as a damage spell early game, or a counter spell late game.
Rathi Trapper
is also controversial, but counts as a rogue for
Morsel Theft
, and helps you ignore their board for longer. Can be switched out with
Wicked Akuba
, but it's pretty hard to swing in with that.
Choking Sands
against affinity/Tron, but I might even run it in the main deck just for early land destruction.